/**
 * @file hello.cpp
 * @author Wells Guan
 * @brief 
 * @version 0.1
 * @date 2021-09-20
 * 
 * @copyright Copyright (c) 2021
 * 
 */

#include<bits/stdc++.h>
/**
 * @brief
 * main funtion 
 * 
 */
using namespace std;
int main(){
    cout<<"Helloworld!"<<endl;
}